MATH NET DECIMAL NUMBERS

1. MATH NETDECIMAL NUMBERS SOFIA LOZANO MARIA JOSE LAVERDE LAURA JIMENEZ GABRIELA CARDOZO.

2. The word "Decimal" means "based on 10" (From Latin decima: a tenth part). "Decimal Number" usually means there is a Decimal Point. Decimal numbersdefinition.

3. Decimal Point The number to the left of the decimal point is a whole number and is 10x bigger. The number to the right of the decimal point is 10 times smaller and is a decimal number. As we move further right, every number place gets 10x smaller. The decimal point is the most important part of a Decimal Number. It is exactly to the right of the Units position. Without it, we would be lost ... and not know what each position meant.

4. other decimal numbersdefinitions. • A linear array of digits that represents a real number, every decimal place indicating a multiple of a negative power of 10. • For example, the decimal 0.1 = 1/10 , 0.12 = 12/100 , 0.003 = 3/1000 .

5. A DECIMAL NUMBER IS ALSO CALLED DECIMAL FRACTION: • A Decimal Fraction is a fraction where the denominator (the bottom number) is a number such as 10, 100, 1000, etc. (in other words a power of ten) , the power depending on or deciding the decimal place. For example: • the decimal 0.1 = 1/10 , • 0.12 = 12/100 , • 0.003 = 3/1000 .

6. Questionsaboutdecimals IS DIFFERENT 0.3- 0.03? ANSWEAR: yes, because 0.03 is 10 times smallerthan 0.3.

7. Questionsaboutdecimals • Why 0.8 isbiggerthan 0.50? • Answer: First, youhave to knowthat 0.50 = 0.5 . Then, 0.8 is bigger than 0.5 because 0.8 = 8/10 or 8 parts of ten equal parts and 0.5 = 5/10 or 5 parts of ten equal parts so 8 is greater than 5.

8. Writing Decimal numbers Fraction : 12 100 Decimal: 0.12 PROBLEM: write a decimal and a fraction in simplest form for the part that is black.

9. Decimal in dóllar 1 cent = to 0.01 25 cents = 0.25 50 cents = 0.50 5 cents = 0.05 5 dollars = 5.00 10 cents = 0.10 1 dollar = 1.00

10. PROBLEM Lina have to pay 43 dollars to buyhertoy and shehave 100 dollars. a. writethis in a fraction and in decimal form. b. Howmuchmoneydoesshehaveleft? c. Can shebuywiththemoneyleftanothertoythatcost 64.50 dollars?

11. Answers! a. 43/100 = 0.43 b. 100 – 43 = 57 . Shehadleft 57 dollars. c. No shecan’tbuytheothertoybecauseshe needs 7.5 dollars more.

12. Use ofDecimal numbers To know about decimal numbers is important because in daily life we have to use like money to buy things, in school for science and math to find volume, weight, etc. and to find the distance between two places.

13. Decimal numbers and dollars • PROBLEM: I want to buy a candy bar for $0.75. If I buy 4 candy bars, how much money will I spend? • STRATEGY: Multiplication • PROCESS: $0.75 x 4 ----------- $3.00 • ANSWER: I will spend $ 3.00 dollars.

14. Use of Decimal numbers PROBLEM: In my neighborhood are 1,000 apartments and only 50 of them have balcony. How can you write this information in fraction and decimal numbers? ANSWER: Fraction:50 1000 Decimals: 0.005

15. Use of Decimal numbers PROBLEM: Mateo has with his name 4 colors of 100. How can you write this information in fractions and in decimals? ANSWER: Fraction: 4 100 Decimal: 0.04

16. Use of Decimal numbers • The radio tower is 4.2 kilometers east of the bakery. The gift shop is 14.2 kilometers east of the bakery. Which is closer to the radio tower, the gift shop or the bakery? a. gift shop b. bakery

17. Use of Decimal numbers • In chemistry laboratory we can measure measuring water volume using both a ruler and a graduated cylinder. • In this image the volume of water is 70.3 ml.

18. Use of Decimal numbers • During science laboratory we can study various physical properties of matter. • Example: we can measure mass using a pan balance to find the mass of a linking cube. Mass couldbe of 3.6 grams.

19. BIBLIOGRAPHY • http://www.mathsisfun.com/decimals.htm • http://www.google.com/imgres?imgurl • http://www.kidsmathblog.com/wpcontent/uploads • http://www.tutornext.com/help/decimals-tenths-hundredths • http://4cornerscce.blogspot.com/2010_11_01_archive.html